For a Correct Measurement
Body fat is affected by the change of water content in the body.
A person’s hydration level and blood circulation may have an effect on their body fat reading. In the table below are some situations which could affect the reading.
For a Correct Measurement
Cause of Fluctuations | Examples of Fluctuation Periods | |
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Water and food intake | 1 to 2 hours after breakfast, lunch, | |
or dinner | ||
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| After taking a bath or shower, | |
Changes in blood circulation | immediately after exercising, in extreme | |
environments (warm or cold), during | ||
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| illness or extreme fatigue | |
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Change in posture (during | Moving from an | |
measurement) | position to lying down or prone position | |
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The diagram below shows an example of the changes in body fat throughout the day caused by a change of water content in the body. The changing pattern of body fat percentage varies for each person. In order to obtain highly reliable readings, please note the following pages.
An example of the fluctuation of body fat percentage throughout the day
Body fat (%)
25.0
24.0
23.0
22.0
| 7:00 |
| 9:00 | 11:00 | 1:00 | 3:00 | 5:00 | 7:00 | 9:00 | 11:00 |
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| a.m. | a.m. | a.m. | p.m. | p.m. | p.m. | p.m. |
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| Waking up |
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| Lunch |
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activity |
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| Breakfast |
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| Taking a bath |
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| Going to bed | ||
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